GMPartsGiant.com offers the wholesale prices for genuine 1988 Chevrolet Suburban R20 parts. Parts like Accelerator Control Engine Compartment are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 8 Cyl 5.7L, 8 Cyl 6.2L Diesel, 8 Cyl 7.4L. Model Code: 3/4 TON.